Experimental Determination and Numerical Calculation of Fracture Viscosity Criterion (J-integral)
Abstract
The paper shows that it is necessary to accept energy J-integral criterion as a criterion of fracture viscosity under conditions when the zone of plasticity is rather large at crack top. Numerical modeling of fracture process has shown good convergence with experimental investigations of J-integral parameter. Values of J-integral for 38ХНЗМФА steel, ЭП-131 cobalt alloy, MT molybdenum alloy have been experimentally determined. It is revealed that high-velocity deformation at explosive steel processing forms structure with high parameters of fracture viscosity and significant increase in material yield strength.
About the Authors
V. N. Kovalevsky
Belarusian National Technical University
Belarus
Belarus
E. V. Sagarda
Belarusian National Technical University
Belarus
Belarus
A. E. Zhuk
Belarusian National Technical University
Belarus
Belarus
G. M. Senchenko
Belarusian National Technical University
Belarus
Belarus
References
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2. Кгошр К., Pabst R. F. Cber die Ermittlung von J Integralwerten bei keramischen Werkstoffen im Hochtempe- raturbereich. - Materialpriif. 22,1980. - S. 241-246.
3. Ковалевский В. H. Оценка работоспособности и разрушения слоистых материалов, полученных сваркой взрывом // Сварка и родственные технологии: Республ. межвед. сб. - Мн., 1999. — Вып. 2. - С. 50-53.
Review
For citations:
Kovalevsky V.N., Sagarda E.V., Zhuk A.E., Senchenko G.M. Experimental Determination and Numerical Calculation of Fracture Viscosity Criterion (J-integral). Science & Technique. 2005;(2):34-37. (In Russ.)
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